John f



(No Model.)

J. F. PAOKER.

ATTAGHING MOLD BOARDS.- y No. 882,185. Patented May 1, 1888.

UNITED STATES .PATENT OFFICE.

JOHN F. PACKER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE DAVID l BRADLEY MANUFACTURING COMPANY, OF SAME PLACE.

ATTACHING MOLD-BOARDS..

SPCFA-TN forming part of Letters Patent No.32,15l. dated May `1838.

Application tiled August 20, 1887. Serial No. 247,480. (No model.)

To all whom it may concern:

Be it known that I, JOHN F. PACKER, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented a new and useful Inuprovenientin Attaching Mold-Boards,ofwhieh the following is a'speciiication, reference being had to the accompanying drawings, in which Figure lis a perspective View with the parts in place and the mold-board broken out to show one of the supporting-bosses in section; Fig. 2, a rear face View of the mold board, showing the supporting-bosses applied thereto; Fig. 3, a section on line m x of Fig. l; Fig. 4, a perspective View of the standard, showing the supporting-bosses applied thereto.

Mold-boards made of steel or chilled iron are liable to warp or twist out-of their line of curvature in cooling, and this warping out of shape, although it does not injure or affect the working of the plow, is found very objectionable in that it does not accurately lit the standard to which it is to be attached, the result being that in drawing the mold board into place by the bolts the strain at one point will be sufficient to crack or break the mold-board, requiring great care in making the attachnient.

The object of this invention is to overcome this obj ecton in steel or chilled-iron moldboards; and its nature consists in providing three bosses or lugslocated to give three points of support in triangular form and at the points Where the fastening-bolts are located, and these supporting lugs or bosses can be either on the under face of the mold-board or on the upper face ofthe standard or support, as may be desired.

In the drawings, A represents the moldboard, made ofsteel or chillediron,in any usual or Well-known form of curvature.

B is the point, also made of steel or chilled iron, of any usual or well-known form of construction adapted for use with the form of mold-board.

C is the standard, projecting above the plow, as usual, for attachment to the beam and having a lower portion curved and formed to correspond to and receive the mold-board and point, as usual, and, as shown, the front edge of the standard is formed wit-h a flange or ridge, C', of a thickness and curvature to correspond with the ilanges and curvature of the mold-` board, and against which the edge of the inold board abuts and lits.

D is the landside, ofthe usual construction.

As shown in Figs. 1 and 2, the under face of the mold-board has formed thereon three lugs, a b e, which lugs are located at the points on the n1old-boards through which the attachingbolts pass, and these lugs or bosses are located in a triangular relation to each other, so that an uneven bearing cannot be had, as a Contact with one must be with all, as with any support having three bearing-points only. As shown in Fig. 4, the lugs or bosses forming the three bearingsl are located on the standard, instead of on the under face of the mold-board, butin the same relation and operating in the same manner as with the bearings on the moldboard. These bosses do not interfere in any manner with the operation ofthe plow; but by their use a three-point bearing is formed, by

which no undue strain or pressure can occur at any one point that will crack or break the mold-board when brought down to place by the bolts.

Vhat-I claim as new, and desire to secure- JOHN F. PACKER.

Witnesses:

ALBERT H. AnAMs, HARRY T. J oNns. 

